Preprints
https://doi.org/10.5194/egusphere-2023-2736
https://doi.org/10.5194/egusphere-2023-2736
23 Nov 2023
 | 23 Nov 2023

Various lithospheric deformation patterns derived from rheological contrasts between continental terranes: Insights from 2-D numerical simulations

Renxian Xie, Lin Chen, Jason P. Morgan, and Yonghsun John Chen

Abstract. Continents are formed by the amalgamation of numerous micro-terranes and island arcs, so they have spatially varying lithosphere strengths. The Crème brȗlée (CB) model and the Jelly sandwich (JS) model have been commonly used to describe continental lithosphere strength-depth variations. Depending on the strength of continental lower crust, the CB and JS models can be further subdivided into two subclasses, in which the I subclass (CB-I and JS-I) and II subclass (CB-II and JS-II) respectively have a strong or weak lower crust. During continental collision, lithosphere deformation is the byproduct of the comprehensive interaction of multiple terranes. Here we used 2-D thermo-mechanical numerical models that contain three continental terranes to systematically explore the effects of terranes with various strengths on continental deformation, and studied the effects of different rheological assumptions terrane deformation. We find four types of lithosphere deformation patterns: collision, subduction, thickening and delamination, and replacement. Lithosphere structures, especially local pre-existing weaknesses, also have nonnegligible influences on lithosphere deformation. These simulation patterns are seen in observed deformation patterns and structures in East Asia, suggesting they are likely to be naturally occurring modes of intracontinental orogenesis.

Renxian Xie, Lin Chen, Jason P. Morgan, and Yonghsun John Chen

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2023-2736', Anonymous Referee #1, 14 Dec 2023
    • AC2: 'Reply on RC1', Renxian Xie, 01 Mar 2024
    • AC1: 'Reply on RC2', Renxian Xie, 01 Mar 2024
  • RC2: 'Comment on egusphere-2023-2736', Anonymous Referee #2, 06 Jan 2024
    • AC1: 'Reply on RC2', Renxian Xie, 01 Mar 2024
    • AC2: 'Reply on RC1', Renxian Xie, 01 Mar 2024
Renxian Xie, Lin Chen, Jason P. Morgan, and Yonghsun John Chen

Data sets

Various lithospheric deformation patterns derived from rheological contrasts between continental terranes: Insights from 2-D numerical simulations Renxian Xie, Lin Chen, Jason P. Morgan, Yongshun John Chen https://doi.org/10.5281/zenodo.8354366

Renxian Xie, Lin Chen, Jason P. Morgan, and Yonghsun John Chen

Viewed

Total article views: 192 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
125 48 19 192 16 5 4
  • HTML: 125
  • PDF: 48
  • XML: 19
  • Total: 192
  • Supplement: 16
  • BibTeX: 5
  • EndNote: 4
Views and downloads (calculated since 23 Nov 2023)
Cumulative views and downloads (calculated since 23 Nov 2023)

Viewed (geographical distribution)

Total article views: 187 (including HTML, PDF, and XML) Thereof 187 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 03 Mar 2024
Download
Short summary
Continental terranes have various rheological strengths due to the differences on their ages, compositions and structures. We applied four assumed rheological models to three terranes in a collisional model, and obtained four styles of lithosphere deformation pattern of collision, subduction, thickening/delamination, and replacement. These simulation patterns are seen in observed lithosphere deformation patterns and structures in East Asia.